F85SV Wood Burning Space Heater Conventional Flue

For larger workshop & factory heating or for medium sized poorly insulated buildings. Wood and waste burning hot air heater. With up to 93kW heat output. 3 phase electric supply. Suitable for conventional flue installations in excess of 8m high.

Available To Order: Call for Delivery
Guide Only. Holidays & Brexit may change expected dates.

Width 800 mm
Height 1760 mm
Depth 1280 mm
Flue Spigot Internal Diameter 180 mm
Fuel Chamber Depth 750 mm
Fuel Chamber Width 560 mm
Fuel Chamber Height 700 mm
Min Clearance Rear 1000 mm
Min Clearance Side 600 mm
Min Clearance Front 1500 mm
Electrical Consumption
Ventilation Fan Power 1.12 kW
Electrical demand Amps 8.5 Amps
Amps per phase 1.9 Amps
Air Delivery Pipe Diameter ID 250 mm
Number of Air Delivery Pipes 2
Ventilation Fan Power 1.12 kW
Heated Air Flow 6300 m3/hr
Fuel Type
Fuel Type Approved Wood Waste, Wood log
Fuel Consumption 30 Kg/hr
Chimney Specification
Flue Spigot Internal Diameter 180 mm

F85 Wood Burning Space Heater

Larger size in the range of space heaters. It is ideal for areas that require quick heating or constant all-day heat requirements.

With its larger fuelling capacity than the F55 and the resultant higher heat output, the F85 is more suitable for larger workshops.

The footprint of the F85 is a little larger than the F55 but it will still only take up minimal space yet produce large amounts of heat in a short time.

F85 SV or F85 CV models

The F85SV is a natural chimney draught unit. The combustion air is drawn into the Fabbri via the negative pressure of the chimney. The chimney needs to be constructed to provide the required negative pressure for correct combustion. (see technical table for details).

The F85CV model comes with a chimney flue fan. This fan activates from the controller and produces a negative pressure within the flue. A chimney system is still required to expel the produces of combustion.

Wood fuel

Wood for burning in the space heater can come in many forms, the most important point is that it is dry. Small kindling will be needed to light the heater then large wood sections for continuous operation.

How to light your Zero space heater

It’s a very simple and very quick operation. Lay smaller kindling sized wood along with crumpled paper towards the front of the fuelling chamber. Open the open flap, light the paper and off you go.

The space heater has two front doors, the lower for access to remove ash whilst the upper door allows access for fuelling of the wood.

Automatic activation

The space heater includes a simple and easy to use control activation system. When the onboard temperature sensor detects heat in the upper chamber, it automatically starts the air distribution fans which bring in cold air from the bottom of the unit, heat this up, and then expels the warm air out of the distribution tubes at the top.

Directional air ducts

The directional exit air tubes allow the user to move the directions fast flowing heat air to where its most needed by a simple rotation.

Air volume

The onboard fan will move around 3500 m3/hr of air.  

As a guide, if the area to be heated is 1,000m3 of volume the air will pass through the space heater 3.5 times in 1 hour. So, the whole volume of that space will be reheated 3.5 times every hour.

Heat output control

The heater is fitted with two air control flaps, an upper (secondary air) flap and a lower (primary air) flap. The primary air flap is simply adjusted by turning a knob to increase or decrease the burning speed,  while the upper secondary air control mixes air with the burning gasses to improve the burning efficiency.

Cleaning and maintenance

How often you will need to give the hot air heater a clean depends on the fuel used and quantity burnt. However, the system is designed to run for long periods between larger cleans smaller de-ashing can be as little as once per week.

Summer operation

As a very useful extra, the onboard fans can be activated in warm conditions to push cooling are around your workshop or factory.


Installation is very straight forward. Choose an allocated location for the wood space heater. If using the provided chimney installation kit, connect the flue together until it reaches the roof area. Mark and cut a suitable hole, continue the flue until it achieves the correct height. Fit the chimney roof support and flashing around the chimney and the chimney cowl if supplied. We would recommend an experienced installer to asset with the installation. Connect the electrical supply (details of power requirement are in the technical details).

Running costs

The on-board air circulation fan requires a small amount of electricity, (see technical table for details). No regular spare parts are expected if the boiler is maintained. Eventually, you may require a grate or other part, but this should be a long way in the future.

Space heaters the low cost solution for heating industrial units, workshops or factories with wood heating.
Installation and Operation Manual F85 F120 F240
175mm diameter Flue starter piece for F55 and F85
Flue support stand for Fabbri F28 through to the F240
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We use case studies as examples of how and where our solutions work best. We try and give an example of each model and an application or environmental improvements.

Fabbri offer full industry leading pre and after sales technical support.
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Safe operating distances from working and stored items.
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Chimney and flue installation of Fabbri wood burning space heater with flue fan
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